Allied 24020H-004IS100 Indexable Spade Drill 1-1/3/8in Taper

Product Description

The ALLIED MACHINE AND ENGINEERING 24020H-004IS100 is an indexable spade drill from the T-A SS 2 series, designed for general-purpose drilling in steel and similar workpiece materials. It covers a diameter range of 1 inch to 1-3/8 inches and reaches a maximum drill depth of 5-3/8 inches. The helical flute geometry promotes efficient chip evacuation in deep-hole applications. A 4MT taper shank provides rigid, self-holding clamping in compatible spindle noses. Through-coolant capability with axial concentric and radial coolant entry keeps the cutting zone cool and extends insert life during extended runs. Machinists and toolroom professionals specify this body for production drilling in steel components where consistent hole quality and repeatable depth control are required.

This spade drill body is suited for CNC machining centers, manual boring mills, and drill presses equipped with a No. 4 Morse taper spindle. It handles ferrous workpieces including carbon steel, alloy steel, and similar P-code materials. The standard-length classification and 11-3/8-inch overall length make it appropriate for a wide range of fixture depths. Indexable insert spade drills like this body are commonly found in job shops, production machining environments, and maintenance repair operations where through-hole and blind-hole drilling in steel is a routine operation.

Key Features

• Diameter range of 1 inch to 1-3/8 inches accommodates multiple insert sizes in one body
• Helical flute design promotes positive chip flow and reduces chip packing in deep holes
• Through-coolant support via axial concentric and radial ports for effective heat management at the cutting edge
• 4MT taper shank provides self-holding engagement in standard Morse taper spindles
• T-A SS 2 series body built from steel for durability in general-purpose ferrous machining
• Maximum drill depth of 5-3/8 inches supports both through and blind-hole applications

Compatibility

Designed as a T-A SS 2 series indexable spade drill body compatible with No. 4 Morse taper spindle machines and appropriate T-A series indexable spade drill inserts for the 1 inch to 1-3/8 inches diameter range. Consult Allied Machine and Engineering insert selection guides to confirm correct insert pairing for the target diameter and workpiece material.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom safety procedures. Power down and lock out the machine spindle before mounting or removing the drill body. Inspect the taper shank and spindle socket for burrs or debris before seating; a clean, properly seated taper is critical to runout control and safe operation. Always confirm insert seating and screw torque per the insert manufacturer's guidelines before initiating a cut.